The EBC driver emits thunks for native to EBC calls, which are short
instructions sequences that bridge the gap between the native execution
environment and the EBC virtual machine.
Since these thunks are allocated using MemoryAllocationLib::AllocatePool(),
they are emitted into EfiBootServicesData regions, which does not reflect
the nature of these thunks accurately, and interferes with strict memory
protection policies that map data regions non-executable.
So instead, create a new helper EbcAllocatePoolForThunk() that invokes the
AllocatePool() boot service directly to allocate EfiBootServicesCode pool
memory explicitly, and wire up this helper for the various architecture
specific thunk generation routines.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
* This patch introduces EbcDebuggerHook.c/h and inserts the required
EBCDebugger references into the existing EBC source files.
* With all the hooks defined to their empty version in EbcDebuggerHook.c
the existing EBC VM behaviour is left unaffected.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
Ia32/EbcLowLevel.asm to Ia32/EbcLowLevel.nasm
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Without this change, after converting this code to NASM, this error
will be reported:
error: comma or end of line expected
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Add missing EFIPAI for EbcInterpret and ExecuteEbcImageEntryPoint().
Get return value in EbcLLCALLEXNative(), remove EbcLLGetReturnValue().
2) Fix IA32 EBC interpreter bug on MOVsnw and MOVsnd.
3) Some cleanup
Add missing ReturnEBCStack() for IA32 build.
Remove unnecessary EbcLLGetStackPointer() for X64 and IPF build.
Remove deadcode EbcLLGetStackPointer() and EbcLLGetReturnValue() in IA32/X64/IPF ASM code.
Dump more info in CommonEbcExceptionHandler().
Signed-off-by: jyao1
Reviewed-by: Elvinli
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12745 6f19259b-4bc3-4df7-8a09-765794883524
Ard Biesheuvel
Pete Batard
Jordan Justen
Feng Tian
jyao1
hhtian
rsun3
xli24
qhuang8
vanjeff